This depends when the noise happens:
If a radiator does not have enough time to warm up, it could end up making a squeaky noise. Also, a faulty radiator will make a squeaky noise.
It could mean one of your timing belts are loose
It could mean the beginning of the end for your belt or the idler pulley, have them both checked out.
WD40
check your shock absorber
a bubble of gas that pops as it come out of the anus causing a squeaky noise.
how long ago was the clutch fitted , what sort of noise
THIS HAPPENED TO MY CAR IT WAS THE SLAVE AND THE SYSTEM HAD TO BE BLED
Usually a high-pitched noise, which can often sound scrapy or squeaky.
sounds like maybe a clutch release bearing. what vehicle
squinky, wheepy, creepy, sneaky, sleepy and more...
You did not define "squeaky" but if there is a shrill noise when you startup or accelerate under engine load then it could be your serpentine belts slipping. Take a look at the 3 belts and see if they are glazed (shiny). If so then it is best to replace them.